Stop mechanism



T. HJSEELY.

STOP MECHANISM. 7

APPLICATION men SEPT.8,' 1911. 1,356,406. Patented 060,19, 1920 2 SHEETSSHEET 1- //v MBA/727R T. H. SEELY.

STOP MECHANISM. APPLICATION FILED SEPT. a, 1917.

1 .356 ,406. Patented Oct. 19, 1920'.

2 SHEETS-SHEET 2.

1 UNITED STATES PATENT OFFICE.

THOMAS H. SEELY, OF MALDEN, MASSAGHU-SETTS, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO UNITED SI-IOE'MAGHINERY CORPORATION, OF PATERSON, NEW J ER- SEY, A CORPORATION OF NEW JERSEY. I

sror MECHANISM.

Specification of Letters Patent.

Patented Oct. 19, 1920.

Application filed September 8,- 1917.' Serial No. 190,355.

To all to 710m it may concern:

Be itknown that I, THOMAS H. SEELY, a citizen of the United States, residing at Malden, in the county of MiddleseX and State of Massachusetts, have invented certain Improvements in Stop Mechanisms, of which the following description, in connection with theaccompanying drawings, is a specification, like reference characters on the drawings indicating like parts in the several figures.

This invention relates to mechanisms for controlling the operations of machines which are to be driven through any number of repeated cycles and stopped at a predeter mined point in the cycle, an illustrative embodiment of the invention being herein shown and described as applied to a lasting machine of the hand method type, such, for example, as that disclosed in United States Letters Patent No. 584L744, granted June 15,

1897, on application of Ladd and McFeely. 7

While various mechanisms have been devised heretofore for this purpose, none of them is entirely satisfactory. One objection to various prior devices of this char-' acter has been that the application of such a device has substantially increased the pressure upon the treadle required to start the machine, thus changing the feel of the machine to the operator, requiring greater exertion on his part, and causing him, therefore, greater fatigue in the course of a days run.

stop mechanism which can be applied to a machine without the operator feeling any applying the brake. By the use of the pres An object of this invention is to provide a ent invention, however, I am able to effect the stopping of the machine accurately at a predetermined point without resorting to the userof a cam which is necessarily costly to construct and hard in its action.

Important features of the invention consist in employing means such as an eccentric strap, or means which embraces the eccentric, as the means through which the brake is applied, and in mounting the strap for swinging movement about the eccentric so as to be swungin one direction by manual means and in the other direction by gravity, the construction and arrangement being such that, when the eccentric strap is allowed to swing by gravity, the brake will be applied and when manually swung slightly from the position it assumes under the influence of gravity the brake will be released. Preferably the eccentric strap acts upon the brake shoe through intermediate means and the brake is arranged for rocking movement relatively to the said means so as to bear evenly upon the pulley, and adjustable means is provided for maintaining the ends of the shoe equally spaced from the pulley when the brake is released to avoid contact of the shoe with the pulley when the machine is running. I

These and other features of the invention including various novel constructions and combinations of parts will appear more fully from the following detailed description when read in connection with the accompanying drawings and will be pointed out in the appended claims.

Figure 1 is a side view of the rear portion of a'lasting machine equipped with an embodiment of this invention Fig. 2 is a-nenlarged detail view of the stop mechanism as seen from the rear of the machine; and l Fig. 3 is a perspective detail ofparts shown in Fig.2., I I

In the accompanying drawings, the reference numeral 2 indicates a brake drum secured to the main shaft 3 of the machine, which drum may serve as the driving pulley of the machine and be driven fromthe usual counter-shaft 4, Fig. 1, having a friction,

clutch 5operated by a treadle 6. When the treadle 6 is depressed a rod 7 is pushed upwardly against a spring 8. The upper end 9 of the rod is wedge shaped to act on a roll 10 on member 11 mounted on the main shaft 3 of the machine to swing toward the right in Fig. 2 Mounted on the member 11 for movement radially of the drum or pulley 2 is a detent block 14. The block 14 is guided between surfaces 16, 18 on the member 11 and has a stem 20 guided through the member 11 and having on its inner end *ashers 22 and stop and set nuts 24, 26, respectively. Upon the stem 20 between the member 11 and the block 14 is a stiff spring 28. T he portion of the member 11 which is mounted on the shaft embraces an eccentric 3O pinned to the shaft. The member 11 therefore constitutes an eccentric strap. The eccentric, when in the position shown, has rocked the member about the roll 10 as a fulcrum and forced the outer end of the detent block 14 against a plate 32 which is adjustably held to one end of a lever 34 fulcrumed at 36 on bracket 38 attached to the frame of the machine at 39. The plate 32 is held to the lever by a screw 40 passing through a slot in the plate and a screw 42 is provided for effecting fine adjustment of the plate radially of the drum 2 when the screw 40 is loosened. Pivoted to the lever 34 between its ends at 35 is a brake shoe 44 having a lining 45 of leather or other suitable material. The brake shoe has a downwardly extending portion 46 having an opening 47 loosely to receive a pin 43 fixed in the bracket 38 by a set screw 49. The portion 46 carries a pin 50 between which and the pin 43 is arranged a tension spring 52 to lift the brake shoe when the opposition of the stiffer spring 28 acting through the detent 14 is released. Stop screws 54 are provided on the portion 46 to engage the pin 48 and determine the position of the brake shoe when released, the screws being preferably adjusted so that both ends of the brake shoe will be spaced equally from the rim of the drum or pulley 2.

It will be seen that when the rod 7 is raised by depression of the treadle 6 to start.

the machine the wedge 9 will act on the roll 10 to swing the member 11 toward the right, Fig. 2. causing the detent 14 to slide off the plate 32. The spring 52 will then lift the brake shoe 44 from contact with the inner ace of the rim of the drum or pulley 2 and allow the machine to be started. The ma chine will then continue to run, the detent at each revolution of the shaft 3 being moved in and out radially of the pulley adjacent to the right-hand face of the plate 32. lVhen the treadle is released, the rod 7 and wedge 9 will, of course, be depressed, relieving pressure on the roll 10 and allowing the member 11 to swing by gravity until the side face of the detent 14 rests against the plate 32. As the drum or pulley 2 con tinues to move, the detent 14 will be lifted by its eccentric 30 above the end of the plate 32 and will then be moved downwardly against the end of the plate 32, thus applying the brake and stopping the machine. Of course, the treadle might be released at such a pointin the cycle that the detent 14 would swing immediately over the end of the plate 32, whereupon the machine would be stopped at once. In any event, movement of the machine will continue only until a pre determined point in its cycle has been reached and its movement will then be arrested as described.

Referring to Fig. 1, it will be observed that the member 11 is provided above the shaft 3 with an oil cup 21 and below the shaft with an inwardly directed projection 23 which directs the drip of the oil from the shaft inwardly and prevents the oil from falling upon the rim of the pulley 2. This is desirable since the pressure of oil upon the rim would impair the frictional hold of the brake shoe lining 45 upon the rim of the pulley 2.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. A stop mechanism comprising a driven shaft, a rotating member on the shaft having a portion to be engaged by a brake, a member mounted on the shaft for swinging movement, means onthe shaft for moving said member toward the said portion, a brake shoe adapted to engage the pulley rim, and means for swinging said member, the parts being constructed and arranged so that in one position of said swinging member the brake shoe will be applied to the said portion by movement of the member toward the said portion to stop the machine at a predetermined point and in another position of said member the brake shoe will remain inoperative.

2. A. stop mechanism comprising a driven shaft, a brake drum on the shaft, a member mounted for movement on the shaft and for movement radially of the shaft, mean on the shaft for moving said member radially toward the rim of the drum, a brake shoe adapted to engage the said rim, and manually controlled means for moving said member to different positions on the shaft, the parts being constructed and. arranged so that in one position of said member the brake shoe will be applied to the said rim by movement of the member toward the rim to stop the machine at a predetermined point and in another position of said member the brake shoe will remain inoperative.

3. A stop mechanism comprising a driven shaft, a brake drum thereon, a brake shoe arranged to engage the rim of the drum to arrest its rotation, a member mounted on the shaft for swinging movement about the shaft, means for moving the member'ra'di ally of the drum at each rotation of the shaft, themember being arranged to engage the brake shoe and apply it to the rim when in one position of its swinging movement and in another position of its swinging movement to allow the brake shoe to remain inoperative, and manual means for controlling the position of said member.

A stop mechanism comprising a driven shaft, a rotating member on the shaft having a braking surface, a brake shoe mounted for movement toward and from the braking surface of the rotating member, a member mounted to swing in one direction by gravity, manually controlled means for swinging the member in another direction, a yielding detent carried on said swinging member, and means for moving the swing ing member in a direction to operate the brake shoe to stop the machine once in each cycle of the machine, the parts being constructed and arranged so that the detent will operate to set the brake at apredetermined point in the cycle when the member is allowed to swing by gravity.

5. A stop mechanism comprising a driven shaft, a brake drum on the shaft, a brake shoe mounted for movement toward and from the rim of the drum about a fixed pivot, a member mounted to swing in one direction by, gravity, manually controlled means for swinging the member in another direction, a yielding detent carried on said member, and means for moving the member in a direction to operate the brake shoeto stop the machine once in each cycle of the machine, the parts being constructed and arranged so that the detent will operate to set the brake at a predetermined point in the cycle when the member is allowed to swing by gravity.

6. A stop mechanism comprising a driven shaft, a brake drum on the shaft, a brake shoe mounted for movement toward and from the rim of the drum about a fixed pivot, an eccentric on the shaft, a member embracing the eccentric and moved thereby radially of the drum to operate the brake shoe, and manual means for moving the member on the eccentric to a position such that it will not operate the brake and the machine will. continue to run.

7. A stop mechanism comprising a driven shaft, a brake drum on the shaft, a brake shoe mounted for movement toward and from the rim of the drum about a fixed pivot, an eccentric on the shaft, a member embracing the eccentric and moved thereby radially of the drum, a detent on the member arranged to operate the brake shoe, and manual means for moving the member on the eccentric to a position such that the deent will not operate the brake and the machine will continue to run.

"8. A stop'me'chanism comprising a driven shaft, a pulley on the shaft, a brake shoe mounted for movement toward and from the rim of the pulley and for rocking movement on an axis located between its ends and parallel with that of the pulley, yielding means for holding the brake shoe away from the pulley, power means for applying the brake shoe to the pulley to stop the machine, and means for holding brake shoe on said axis in spaced relation from the pulley when released from the power means.

9. A stop mechanism comprising a driven shaft, a pulley on the shaft, a brake shoe mounted for movement toward and from the rim of the pulley and for rocking movement on an axis located between its ends and parallel with that of the pulley, yielding means for holding the brake shoe away from the pulley, power means for applying the brake shoe to the pulley to stop the machine, and adjustable means for holding the brake shoe to an evenly spaced relation from the pulley when released from the power means and placed under the influence of the yielding means.

' 10. In a stopmechanism, a driven shaft, a drum thereon, a lever having a fixed pivot, a brake shoe pivoted to the lever and arranged to be pressed against the drum by movement of the lever, a spring to hold the brake shoe normally out of contact with the drum, adjusting means to maintain the brake shoe in equal spaced relation from the drum at its ends, power means for moving the lever to force the brake shoe against the drum, and means for manually controlling the power means.

ll. In a stop mechanism, the combination of a driven shaft, a pulley on the shaft, a

brake shoe arranged to engage the inner face of the pulley rim, means mounted on the shaft inside the pulley rim and operated by the shaft to apply the brake shoe to the rim, and a projection on said means to direct oil applied to the shaft bearing of said means away from the pulley to prevent oil from dripping on the pulley rim and impairing the frictional hold of the shoe on the mm.

12. A stop mechanism comprising, incombination, a driven drum having a rim, a shaft on which the drum is fixed, a brake arranged to be applied to the rim of the drum, an eccentric fixed to the pulley shaft, a strap on said eccentric connections be tween the eccentric strap and the brake for causing the eccentric to apply the brake to the rim, and means operable to permit or to prevent operation of the connections.

18. A stop mechanism comprising, in combination, adriven drum having a rim, a shaft on which the drum is fixed, a brake arranged to be applied to the rim of the 4 m eeo drum, an eccentric fixedto the pulley shaft, and to be unaffected When the strap is in a strap on said eccentric movable on the another circumferential positiong ancl means eccentric circumferentially Of the pulley for moving said strap circumferentially. 10 shaft, mechanism constructed and arranged In testimony whereof I have eignecl my to be acted upon by the eccentric through name to this specifiEation. I

the eccentric strap to apply the brake When the strap is in one circumferential position THOMAS :H. SEELY.

It is hereby certified that in Letters Patent No. 1,356,406, granted October 19,

1920, upon the application of Thomas H. Seely, of Malden, Massachusetts, for an improvement in Stop Mechanisms, errors appear in the printed specification requiring corrections as follows: Page 2, claim 1, lines 100-101, for the words pulley rim read said portion; page 3, claim 10, line 94, before the'word drum insert the Word brake; and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 21st day of December, A. D., 1920.

[snub] L. B. MANN,

Acting Commissioner of Patents. 

